package com.zhinong.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.zhinong.constant.MessageConstant;
import com.zhinong.constant.PasswordConstant;
import com.zhinong.constant.StatusConstant;
import com.zhinong.context.BaseContext;
import com.zhinong.dto.EmployeeDTO;
import com.zhinong.dto.EmployeeLoginDTO;
import com.zhinong.dto.EmployeePageQueryDTO;
import com.zhinong.entity.Employee;
import com.zhinong.exception.AccountLockedException;
import com.zhinong.exception.AccountNotFoundException;
import com.zhinong.exception.PasswordErrorException;
import com.zhinong.mapper.EmployeeMapper;
import com.zhinong.result.PageResult;
import com.zhinong.service.EmployeeService;
import com.zhinong.utils.PasswordUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;


@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO
//        password = DigestUtils.md5DigestAsHex(password.getBytes());
//        if (!password.equals(employee.getPassword())) {
//            //密码错误
//            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
//        }
        if (!PasswordUtils.matches(employeeLoginDTO.getPassword(), employee.getPassword())) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
//
        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);

        //设置默认状态
        employee.setStatus(StatusConstant.ENABLE);

        //设置密码，用md5加密，默认123456
        employee.setPassword(PasswordUtils.encode(PasswordConstant.DEFAULT_PASSWORD));
//        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置默认创建和修改时间为当前
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录人和记录id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(employee);
    }

    //分页查询
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        if (employeePageQueryDTO.getPage() == 0 && employeePageQueryDTO.getPageSize() == 0){
            employeePageQueryDTO.setPage(1);
            employeePageQueryDTO.setPageSize(10);
        }
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total,records);
    }

    @Override
    public void starOrStop(Integer status, Long id) {

        Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        employeeMapper.update(employee);
    }

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        //update方法需要一个employee对象
        Employee employee = new Employee();
        //把DTO对象的属性拷贝进空的employee里
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置更新时间和人员
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public void deleteById(Long id) {
        employeeMapper.deleteById(id);
    }


}
